Design And Implementation Of WLAN Performance Monitor And Optimization System

With the development of WLAN standard technology, WLAN industry as well asthe attention of the public WLAN applications developed gradually.WLAN networkmonitoring and management technologies emerge.How to effectively locateperformance bottlenecks in the operation of the WLAN, performance optimizationforemost solve the problem.Only to find and repair the performance of the variousloopholes that exist in the network, in order to more effectively enhance the efficiencyof WLAN running real advantages of network. In this paper, the technical limitations ofexisting WLAN monitoring the study and design of a WLAN network performancemonitoring and optimization systems (WPMOS). The main research results are asfollows:Design one WLAN performance optimization control model.The control modelboth monitoring system as well as the respective advantages of the adaptive system, setthe bypass collection, traffic analysis and performance optimization in one of theclosed-loop control.Performance analysis of the network’s current status of thedesignated area, and can automatically generate strategies to optimize performanceprogram, complete network optimization control.In-depth analysis of the of802.11DCF modeling key parameters, reference802.11contention window adjustment mechanism.Binary exponential backoff (BEB) algorithmled to the problem of inequality between each sites to compete for resources in thesystem, and designed a new optimization algorithm based on sampling and analysisbackoff mechanism to improve the MAC layer.New backoff mechanism in theevacuation phase of the channel by sending node listener speculated channel congestiondegree, adaptively changing the size of the contention window, and thus effectiveutilization of the channel resources, and the performance test.Compared with BEBalgorithm, the use of the site more equitable competition for resources in the newsystem backoff mechanism. Through the different scene conditions to test performanceparameters, achieved a better channel utilization efficiency and more stableperformance.Overall architecture of WPMOS.Designed DCF based closed-loop real-timefeedback mechanism to optimize the function module, the module to verify the validityof the subsystem optimization strategy, as well as optimize the correctness of thealgorithm.Finally, the system is a functional prototype implementations, including the resultsof the operation to run and demo. In a real network environment for small-scale test to verify the effectiveness, feasibility of the system functions.Some extent alleviate the shared channel contention problem, increase thethroughput of the network, and improve the channel utilization. To verify the feasibilityof the WLAN performance monitoring and optimization system.The results of this research, campus teaching network support is the whole networkteaching network deployment of WPMOCS provided actual reference value.This is thepractical significance of this research.